orumhq/speedscope

Speedscope is a fast, interactive web-based viewer for performance profiles that allows developers to explore profiling data from various languages and environments to identify performance bottlenecks. The tool supports importing from profilers across JavaScript, Ruby, Python, Go, Java, PHP, Rust, and native code, presenting data through multiple views like Time Order, Left Heavy, and Sandwich to analyze CPU usage, memory allocation, and function call patterns. It's designed for developers and performance engineers who need to visualize and understand the behavior of their applications through flamegraphs and other profiling visualizations.